Which type of capture is aimed to improve by a tip cathode?

Cathodal capture refers to the ability of a pacing electrode to stimulate the myocardium via a cathodic stimulation point. When a tip cathode is employed in pacing leads, it enhances the likelihood of achieving effective cardiac capture. This enhancement arises from the configuration of the electrode, which allows for a more focused and improved current flow to the nearby myocardial tissue.

In this configuration, the negative charge at the tip cathode attracts positive ions from the cardiac cell membrane, leading to depolarization and subsequent contraction of the myocardium. This targeted stimulation is crucial, especially in patients with specific conduction abnormalities, allowing for consistent and reliable cardiac pacing.

The characteristics of cathodal capture make it particularly beneficial in pacing scenarios where stronger and more effective stimulation is necessary, contributing to better outcomes for patients requiring pacing devices.